If your destination is east of Village Center Drive (shown in blue), use Yorba Linda Boulevard/Weir Canyon Road from the Riverside Freeway to get to and from your destination. If your destination is west of Village Center, use Imperial Highway to the greatest extent possible to get to and from your destination.
Mouth ulcers are caused by many disorders. These include: 1  Canker sores. 2  Gingivostomatitis. 3  Herpes simplex (fever blister). 4  Leukoplakia. 5  Oral cancer. 6  Oral lichen planus.
Some cases of complex mouth ulcers are caused by an underlying health condition, such as an impaired immune system; nutritional problems, such as vitamin B12, zinc, folic acid, or iron deficiency and gastrointestinal tract disease, such as coeliac disease and Crohn's disease.